Physics – Optics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..335f&link_type=abstract
NOAO Proposal ID #2008B-0335
Physics
Optics
Scientific paper
The cold-dark-matter (CDM) paradigm predicts a high mass-fraction of CDM substructures around galaxy-scale halos. Gravitational lensing offers a powerful method to detect these substructures out to z=1 and to quantify their mass. The gravitational lens system B2045+265 cannot be modelled with a smooth mass distribution, and not surprisingly, we have found luminous substructure (a dwarf galaxy) in HST and adaptive- optics imaging. We request GMOS longslit spectroscopy under good seeing conditions to determine if the spatial location of the previously detected [O II] emission in this system coincides with that of the dwarf galaxy. A spatial match would confirm that the dwarf is at the same redshift as the lensing galaxy, and thus that it is a CDM substructure of the main parent halo. These observations are important because the results of lens modelling require the dwarf satellite to be highly flattened and more massive (~1% of the parent halo mass) than what is predicted from the latest numerical simulations (<0.3%).
Auger Matt
Fassnacht Christopher
McKean John
Mosquera Ana
No associations
LandOfFree
Evidence for luminous CDM substructure in a moderate-redshift lensing galaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evidence for luminous CDM substructure in a moderate-redshift lensing galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for luminous CDM substructure in a moderate-redshift lensing galaxy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1806573